You can use the Workflow Process Monitor task to monitor workflow processes that have been set up for the site. If a process is a long-running process and it is no longer needed, you can stop the process.
The Workflow Process Monitor lists all workflow rules that are currently in process. This list is typically empty, since even long-running rules are nearly instantaneous from a human standpoint. However, if you do have a long-running process -- such as a long data transfer -- that you wish to stop, you can do so.
To check and stop a workflow rule that is in process: